beam-emergence direction

例句：

1. 1.The beam-emergence direction of the laser is precisely controlled by the computer system.
   激光的光束发射方向由计算机系统精确控制。
2. 2. The scientists used a special lens to observe the beam-emergence direction of the particle beams.
   科学家们使用一种特殊的透镜来观察粒子束的光束发射方向。
3. 3. The beam-emergence direction of the particle beams can be adjusted to optimize the experiment results.
   粒子束的光束发射方向可以调整，以优化实验结果。